A nonlinear model of a microstrip transmission line with a ferromagnetic film in the presence of excited magnetostatic waves

A method is proposed for constructing a nonlinear mathematical model of a microstrip line with a ferromagnetic film in the presence of excited magnetostatic surface waves. The method uses multiobjective optimization and regression analysis of the data obtained from a multifactorial designed experiment. The adequacy and accuracy of calculations performed with the model constructed are confirmed by comparison with experimental results. Dependences of the radiation impedance of a line with particular parameters on the power of the input signal are calculated for different values of the external magnetic field and frequency.